Nonurothelial benign tumors
Postoperative granulomas

Author: Monika Roychowdhury, M.D.

Revised: 27 September 2018, last major update December 2014

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Post operative granulomas [title]
Cite this page: Roychowdhury, M. Postoperative granulomas. website. Accessed December 11th, 2018.
Definition / general
  • May be due to metals deposited during diathermy, local reaction to tissue necrosis or hypersensitivity reaction (Urology 1990;35:454)
  • Includes “starch” granulomas (Urology 1976;8:507)
Microscopic (histologic) description
  • Palisading histiocytes or giant cells surrounding central necrosis (resembling rheumatoid nodules) or foreign body type granuloma
  • Lesions heal by fibrous scarring
Microscopic (histologic) images

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Differential diagnosis
  • Granulomatous cystitis: terms may overlap; often refers to patients with infectious etiology and no distinct mass